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Hastelloy C276 Fasteners – Composition, Properties and Uses

Hastelloy C276 Fasteners - Composition Properties And Uses

In the world of fasteners, Hastelloy C276 is a renowned material. It is known for its excellent corrosion resistance, high temperature and pressure resistance, and outstanding mechanical properties. Hastelloy C276 is typically used in applications requiring extreme temperature and corrosion resistance. This blog will discuss the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of Hastelloy c276 hex bolts.


Hastelloy C276 Fasteners Composition

The primary elements in Alloy c276 stud bolts are nickel, molybdenum, and chromium. It also contains tungsten and iron that stabilize the structure and provide high-temperature strength. Hastelloy C276 fasteners may also contain trace amounts of carbon, sulfur, manganese, silicon, and phosphorus, which can modify the material’s properties.

Grade C Mn Si S Co Ni Cr Fe Mo P
Hastelloy C276 0.010 max 1.00 max 0.08 max 0.03 max 2.50 max 50.99 min* 14.50 – 16.50 4.00 – 7.00 15.00 – 17.00 0.04 max

Hastelloy C276 Fasteners Physical Properties

Hastelloy C276 Bolts and Nuts are known for their excellent physical properties. They have a high melting point of 1,370°C and a density of 8.9 g/cm³. The material also has a low thermal expansion coefficient, which makes it resistant to thermal stresses.

Hastelloy C276 Fasteners Mechanical Properties

Alloy C276 fasteners are known for their outstanding mechanical properties. They have high tensile strength, which ranges from 880-1,140 MPa, and yield strength of about 400 MPa. The material is also flexible and tough, making it ideal for high-stress and high-pressure applications.

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
Hastelloy C276 8.89 g/cm3 1370 °C (2500 °F) Psi – 1,15,000 , MPa – 790 Psi – 52,000 , MPa – 355 40 %

Hastelloy C276 Fasteners Equivalent

Hastelloy C276 2.4819 N10276 NW 0276 ХН65МВУ NiMo16Cr15W ЭП76

Hastelloy C276 Fasteners Uses

C276 Hastelloy Screws are used in various applications, including chemical processing, aerospace, and oil and gas industries. They are used in heat exchangers, pumps, valves, reactors, and fittings that resist corrosion, high temperature, and pressure. The material is also used in marine applications due to its excellent resistance to seawater corrosion.

Hastelloy C276 Fasteners Heat Treatment

UNS N10276 Fasteners are typically heat-treated to increase their strength and resistance to corrosion. The material is annealed between 1,040-1,160°C and rapidly cooled to room temperature. This process improves the material’s flexibility and removes residual stresses.

Hastelloy C276 Fasteners Corrosion Resistance

UNS N10276 Bolts have excellent corrosion resistance to various chemical environments, including acidic and alkaline solutions, chloride ions, and oxidizing and reducing environments. The material resists pitting and crevice corrosion, making it an ideal choice for harsh and corrosive environments.



Overall, Hastelloy C276 fasteners are essential in industries where extreme temperature, pressure, and corrosive environments are commonplace. They are known for their excellent physical and mechanical properties, including high tensile strength, flexibility, and corrosion resistance. By understanding the material composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of Hastelloy C276, engineers and manufacturers can make informed decisions about using this material in their applications.

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